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Messages - mikkel

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1
Cold Hardy Citrus / Re: US-1279 and SuperSour 2, new and better zygotic parents for cold hardy breeding?
« on: May 26, 2023, 05:12:21 PM »
I have 3 varieties of these Eremo hybrids. None has flowered in the last few years. At least for me it is a dead end for breeding.

2
Cold Hardy Citrus / Re: Table of citrus cold hardiness and %zygotic seed
« on: May 26, 2023, 05:09:46 PM »
Quote from: Ilya11 on May 25, 2023, 05:37:00 PM
In my experience the proportion of zygotic seeds in partially nucellar varieties also depends  on the pollinizator.
Ichang Papeda as pollen donor often leads to zygotic offspring, at least in my experience.

3
Citrus General Discussion / Re: USDA says silicon helps citrus
« on: May 25, 2023, 03:08:14 PM »
I read the article, but I am not sure if silicone is in english the same as in german...
Is there a chemical/sientific name of it?
Silicone in german is something you use to groute the tile in bathrooms.

4
Cold Hardy Citrus / Re: US-1279 and SuperSour 2, new and better zygotic parents for cold hardy breeding?
« on: May 25, 2023, 01:25:44 PM »
Quote from: Jibro on May 25, 2023, 09:11:08 AM
I tested Eremorange in an unheated greenhouse this winter and it was undamaged and started growing without any problems



How dry was the ground? Did you water them?

5
Cold Hardy Citrus / Re: US-1279 and SuperSour 2, new and better zygotic parents for cold hardy breeding?
« on: May 24, 2023, 08:33:12 AM »
Quote from: 1rainman on May 24, 2023, 08:11:19 AM
They have the one poncirus x orange that is an edible f1 hybrid.

Which one do you mean?

6
Cold Hardy Citrus / Re: US-1279 and SuperSour 2, new and better zygotic parents for cold hardy breeding?
« on: May 16, 2023, 10:11:24 AM »
TaiTri is supposed to be nucellar, in my experience the seedlings are differently cold tolerant. I think this can be a sign of zygotic seedlings.
Yesterday I saw a picture of someone where every single seedling was clearly different from the others.
TaiTri could be zygotic at least sometimes.

7
Cold Hardy Citrus / Re: Frosthardiness experience with citrusvarieties in zone 7, down to 3,2 F
« on: May 06, 2023, 01:56:52 AM »
Did all the seedlings survive or did some freeze to death?

8
Cold Hardy Citrus / Re: Frosthardiness experience with citrusvarieties in zone 7, down to 3,2 F
« on: May 05, 2023, 08:35:05 AM »
are these IchangStar60, seedlings or grafted ones?

9
Cold Hardy Citrus / Re: Poncirus hybrid crosses
« on: May 05, 2023, 03:45:32 AM »
Quote from: 1rainman on May 02, 2023, 10:58:59 AM
This one seems promising. It's cold hardy.

https://www.oscartintori.it/en/prodotto/otaheite-orange/

I have several limonia types, maybe even this type (names vary from nursery to nursery). So far all seem to be vulnerable to cold temperatures.

10
Temperate Fruit Discussion / Re: spring blooming loquats
« on: May 04, 2023, 12:51:39 PM »
Piera is another spring flowering loquat. It is a sport of Algerino.

11
Cold Hardy Citrus / Re: Poncirus hybrid crosses
« on: May 01, 2023, 01:54:22 AM »
Quote from: 1rainman on April 30, 2023, 08:12:22 PM
Actually I just saw on the website in Europe they have a lot of meyer lemon crosses.
Hi 1rainman, do you have a link?

12
Cold Hardy Citrus / Re: F2 citrange winter hardiness trial
« on: April 29, 2023, 01:44:59 PM »
It might be an good idea to collect and breedalso with tetraploids. One day it might be helpful in creating triploid seedless hardy varieties.
I have some tetraploid Citrumelos and maybe sinensis x ichangensis. Who knows what it might be good for.

13
Citrus General Discussion / Re: Poncirus
« on: April 26, 2023, 10:52:56 PM »
Quote from: bussone on April 26, 2023, 04:26:31 PM
Quote from: mikkel on April 26, 2023, 03:57:43 PM
It would be interesting to know if Poncirus polyandra has the same fruit characteristic as trifoliata.
If so, the resinous fruits might not be related to winter hardiness. because polyandra is much less winter hardy than trifoliata.
This would raise the hope that one could breed out these characteristics and still retain a hardy plant.

It's not the cleanest article (there are some noteworthy typos), but...
https://www.sciencedirect.com/science/article/pii/S0888754323000617

This suggests polyandra has cold-signaling genes and at least the potential for increased cold-hardiness relative to citrus. How much is unstated, and they never explicitly compare it to trifoliata.

Kunming is at about 6000 ft. I've seen it called zone 9b, but that seems contradictory given it snows there.

My P.polyandra nearly died at -6°C. It is not very coldhardy. I would say there are some Citrus that are more coldhardy than polyandra.

14
Citrus General Discussion / Re: Poncirus
« on: April 26, 2023, 03:57:43 PM »
It would be interesting to know if Poncirus polyandra has the same fruit characteristic as trifoliata.
If so, the resinous fruits might not be related to winter hardiness. because polyandra is much less winter hardy than trifoliata.
This would raise the hope that one could breed out these characteristics and still retain a hardy plant.

15
Citrus General Discussion / Re: how true-to-seed is true-to-seed?
« on: April 26, 2023, 01:30:16 AM »
I have a lot of loquat seedlings too. Just for fun. How long will it take until maturity? I guess it takes a long time, right?

16
Cold Hardy Citrus / Re: Poncirus hybrid crosses
« on: April 22, 2023, 03:01:24 AM »
This winter, I sowed many hundreds of seeds of more exotic varieties such as Haruka, Shekwasha, Kabosu, and others, hoping to find hybrids with other varieties. Crossings among themselves or with rootstock varieties that have bloomed unnoticed. There is variance among the seedlings, even surprisingly so in some varieties, but so far no definitive off-type or even Poncirus-related hybrid.

In my own pollination attempts, I have found that pollination with Ichang Papeda produces hybrids in a lot of cases (off the top of my head, I would even say in all cases). This is true even for varieties that usually produce nucellar seeds. Ichang Papeda also often produces seedlings that bloom after just a few years, including hybrid seedlings. Ichang Papeda has the characteristic of blooming first on the lower branches, not like Poncirus at the top at a certain height. It seems to be a different pattern and is also appearing in some hybrids, leading to earlier flowering.

17
Cold Hardy Citrus / Re: Poncirus hybrid crosses
« on: April 22, 2023, 02:33:25 AM »
Quote from: pagnr on April 21, 2023, 06:38:22 PM
Pagnr, can you elaborate on the concern about open pollination not yielding the desired results?

For mixed rows of Fava broad beans, type A type B type C, if you only collect seed from the middle of each type, it is unlikely that bees have jumped between types along the same long row. Only the adjacent plants in the row are likely to be crossed.

In my experience, it is impossible to get varietally pure fava beans if there is only one plant of a different variety nearby. Even if the varieties are separated by other non-species plants.

A friend who works at the university did a study using fava beans as an indicator of bee activity in the open landscape, since favas are notoriously cross-pollinated. Although no obligatory outcrossers.


18
Cold Hardy Citrus / Re: Morton, prague, fast flowering tri, grafts on taitri in zone 7a
« on: April 19, 2023, 03:27:34 AM »
This is very promising.
My TaiTri seedlings are also among the hardiest. Sacaton Citrumelo seedlings freeze back more often, but the Taitris seedlings withstand the winter almost without damage. this year the foliage is without damage while Sacaton and 5Star seedlings are frozen back right beside them.

19
Cold Hardy Citrus / Re: Winter damage, Yuma citrange F2
« on: April 19, 2023, 03:22:01 AM »
Hello David, I have concluded with my Yuma on the basis of the fruits that it must be a Citrumelo rather than a Citrange. But I am not quite sure yet.

You are of course right that for the F2 it doesn't really matter which variety exactly the parent plants were, except possibly for protocol purposes, so that others can understand what happened there.

In any case, the seedlings are new varieties.

Your plants are very impressive.



20
Cold Hardy Citrus / Re: Winter damage, Yuma citrange F2
« on: April 18, 2023, 05:07:25 AM »
another Yuma in a private collection probably the one that came from Bernhard Voss



afruit


21
Cold Hardy Citrus / Re: Winter damage, Yuma citrange F2
« on: April 18, 2023, 05:04:18 AM »
some monofoliate Sacaton seedlings (in the middle)



Yuma Z252 from Eisenhut nursery


22
Cold Hardy Citrus / Re: Winter damage, Yuma citrange F2
« on: April 18, 2023, 05:00:51 AM »
Sacaton F2 in my garden in summer



by now (Spring 2023)




23
Cold Hardy Citrus / Re: Winter damage, Yuma citrange F2
« on: April 18, 2023, 04:51:08 AM »
Nice project!  I have some Sacaton seedlings in my garden for a few years. They stay small and grow very slowly. The last 2 winters they kept their leaves, but this winter resulted in total leaf loss and probably some died completely.

My plants are now in their 3rd winter but only 40cm tall. How old are yours?

I also have a Yuma Citrange (Z252) from the Eisenhut nursery in Switzerland. It is quite hardy in the pot and survives in the shelter even when the pot is nearly frozen. So far it has had only unripe, seedless fruit. However, my impression is that it might be a type of citrumelo rather than a citrange.


24
Cold Hardy Citrus / Re: Frosthardiness experience with citrusvarieties in zone 7, down to 3,2 F
« on: April 14, 2023, 03:27:49 PM »
Carolina Lime is an unknown seedling that came to Stan Mckenzie from Bernhard Voss. It was probably the original seedling and Stan now has the mother plant. But the parentage remains a mystery.

25
Citrus General Discussion / Re: Nordman Seedless Nagami Kumquat
« on: March 20, 2023, 09:49:25 AM »
one part is seedless the other forms nucellar seeds, not a good prospect. But trial and error will show if it works out

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